/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package controller.all;

import dao.LoaispDAO;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.jasper.tagplugins.jstl.core.ForEach;
import pojo.Loaisp;

/**
 *
 * @author BlueZky
 */
public class ajax extends HttpServlet {

    /** 
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        try {
            String action = request.getParameter("a");
            
            if(action == null || action.length() == 0){
                
            } else if(action.compareTo("sub-catalog") == 0){
                String id = request.getParameter("id");
                
                if(id != null && id.matches("^[0-9]*$")){ 
                    List<Loaisp> danhSach = LoaispDAO.layDSTheoLoai(Integer.parseInt(id));
                    StringBuilder sb = new StringBuilder("{\"data\": [");
                    for(int i=0; i< danhSach.size(); i++){
                        sb.append("{\"ma\" : ").append(danhSach.get(i).getMa()).append(", \"ten\": \"");
                        sb.append(danhSach.get(i).getTen()).append( "\" }");
                        if(i != (danhSach.size()-1)){
                            sb.append(",");
                        }
                    }
                   sb.append("]}");
                    
                    out.print(sb.toString());
                }
            }
             
        } finally {            
            out.close();
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /** 
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
